英文關鍵字
architecture
background
boring
build
circle
detail
drilling
empty
engineering
equipment
factory
gear
hard
heavy
horizontal
industrial
industry
instrument
iron
lathe
machine
machinery
manufacture
manufacturing
mechanic
metal
metalwork
navy
old
plant
power
process
processing
production
professional
rotate
rotator
rusty
slow
spin
spindle
steel
technology
tool
tools
turning
vertical
view
vintage
work